Indoor Unit: Checking The Fan Motor Hall Ic - Daikin Sky Air R-407C Service Manual

Additional Checks for Troubleshooting
5.2

Indoor Unit: Checking the Fan Motor Hall IC

1
Applicable units
Checking
3 3
4
5
3–66
Units using phase cut controlled fan motor with feedback signal.
To check the indoor unit fan motor hall IC, proceed as follows:
Step Action
1 Make sure connector S7 on PCB 1 is properly connected.
2 Make sure the power is ON and that there is no operation.
3 Measure the voltage between pin 1 and 3 of S7.
4 Turn the fan one rotation with your hand and measure the generated pulses.
5 Proceed as follows:
If...
The measured voltage between pin 1 and 3 does
not equal 5 V
The generated pulses do not equal 3 pulses
between pin 2 and 3
The measured voltage does not equal 5 V and
the generated pulses do not equal 3 pulses
between pin 2 and 3
ESIE02–01
Then...
Replace the PCB 1.
Replace the fan motor.
Replace the PCB 1.
Part 3 – Troubleshooting